Bunn JDF-2N Step-down transformer, Fault codes, Former, Replace control board, Ting, Ratio 4+1

Page 26

TROUBLESHOOTING (cont.)

 

 

PROBLEM

PROBABLE CAUSE

REMEDY

Unit is not working and no beep/light

1. Step-down transformer.

Check for 120/24 vac. If no 24vac

fault codes

 

reading, replace step-down trans-

 

 

former.

 

2. Main control board.

If 24 vac present and no red LED,

 

 

replace control board..

 

 

Hint: Red LED on main control board

 

 

is powered from the step-down

 

 

transformer 24 vac and rectified to

 

 

24 vdc by the rectifier.

Difficulty brixing and/or weak bev-

1. Product viscosity or too cold.

Thorough thaw of product before

erage

 

use (35° - 40°)

 

2. Low water pressure.

Maintain 20 psi or higher and a

 

 

minimum flow rate of 3 fl oz/sec.

 

3. High water pressure.

Over 100 psi, install a pressure

 

 

regulator and set to 50 psi.

 

4. Dispense valve adjustment set-

A) Perform 3 second water dispense

 

ting.

test. Factory setting is 1.0 oz/sec.

 

 

Acceptable water flow rate is .-0.8

 

 

to 1.5 oz/sec depending on the mix

 

 

ratio (4+1).

 

 

B) Adjust water to proper mix ratio.

 

 

Once water is set, adjust motor

 

 

speed (RPM) to achieve brix %.

 

5. Brix ratio.

Check for proper brix ratio per prod-

 

 

uct using Total Dispense method

 

 

and or refractometer method.

26

38310 010406

 

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Contents Post Office BOX SPRINGFIELD, Illinois Phone 217 529-6601 FAX 217Contents User Notices Plumbing Requirements Initial SET-UPElectrical Requirements Electrical HOOK-UPInitial Fill Initial Fill ConnectionPlumbing Hookup LoadingPriming Frozen ConcentratesSanitize Switch Refrigeration SwitchRefrigeration Switch Operating ControlsOperating Controls Portion Control Models Refer to Fig Dispenser USEPress and Hold Models Refer to Fig Weekly Sanitizing Cleaning & Preventive MaintenanceDaily Parts Washing Cleaning Cleaning Monthly Clean Condenser Air Filter Annually Replace Pump TubingAdjustment & Optional Settings Temperature Compensated Refractometer MethodPer 3-second test Mix RatioProduct Brix % Adjustment & Optional Settings Pump Speed Programming Cup Size Programming Portion Control Dispensers OnlyAdjustment & Optional Settings Dispenser Lockout Service LockoutAdjustment & Optional Settings Password ProtectionCooling Fault List Dispense Fault ListBeeper Fault DBC display FaultControls Off Dip Switch Function ListRefill indicator when concentrate out is detected Audio feedback during dispensesFunction List Access bath fill valve and top off bath tank TroubleshootingProblem Probable Cause All water LEDs flashCooling system failure or DBC fault TroubleshootingProblem RemedyRefill LED not extinguishing Bottle adapter switch mem- braneDispense touchpad All stations dispense concentrate Main water supply OnlyWater only Problem Probable Cause RemedyConcentrate only Password Initial fill/setupCant access programming Programming password feature Nect fittingsOnce water is set, adjust motor Fault codesIs powered from the step-down Step-down transformerUse of portable water pump Difficulty brixing and/or weak bev Pump tubing ErageStation Difficulty brixing bag-in-boxCoolant Schematic Diagram Schematic Wiring Diagram Schematic Wiring Diagram Schematic Wiring Diagram JDF-2 Control Panel Circuit Schematic Wiring Diagram JDF-2 Remaining Circuits

JDF-2N specifications

The Bunn JDF-2N is a high-performance coffee brewing system that has gained popularity among coffee enthusiasts and professionals for its innovative features and exceptional brewing capabilities. Designed with user convenience and operational efficiency in mind, this machine is ideal for cafes, restaurants, and various other commercial settings.

One of the standout features of the Bunn JDF-2N is its dual brewing capability. It allows for simultaneous brewing of two distinct coffee batches, accommodating high demand and ensuring that customers receive fresh coffee promptly. This feature is particularly advantageous in busy environments, where quick service is essential to maintain customer satisfaction.

The brewing technology employed in the JDF-2N is designed to optimize extraction and flavor. The machine utilizes a precisely controlled spray head that saturates coffee grounds evenly, allowing for a consistent extraction process. This results in a rich, flavorful coffee that highlights the unique characteristics of each coffee blend. Additionally, the machine is equipped with a large-capacity water reservoir, which guarantees a steady flow of hot water, further enhancing brewing efficiency.

Another notable characteristic of the Bunn JDF-2N is its intuitive digital control panel. This user-friendly interface allows baristas and operators to easily adjust brewing parameters, such as brew temperature and time, tailoring the process to specific coffee types or personal preferences. The programmable features enable users to save their favorite settings, ensuring a consistent coffee experience with every brew.

The build quality of the Bunn JDF-2N is robust, featuring durable stainless steel construction that not only maintains aesthetic appeal but also ensures longevity. The machine is designed with serviceability in mind, allowing for easy access to components for maintenance and repairs.

Moreover, the Bunn JDF-2N is equipped with an innovative hot water faucet, offering immediate access to hot water for tea, soup, or other hot beverages, further enhancing its versatility in a commercial setting.

In summary, the Bunn JDF-2N stands out with its dual brewing functionality, advanced extraction technology, user-friendly interface, and durable construction. It represents an ideal solution for businesses that prioritize quality, efficiency, and customer satisfaction in their coffee offerings. With its array of features and reliable performance, the Bunn JDF-2N is a noteworthy choice for any establishment looking to elevate its coffee service.
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